diff options
| author | Xue Lei <Xue.Lei@windriver.com> | 2026-06-11 10:33:50 +0800 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2026-06-23 00:13:36 +0200 |
| commit | 851d961ff248218f681c53cf0f7f08cf8201a117 (patch) | |
| tree | 9711482a5abc843d109a0eeabe6b69ba610e6595 /drivers/rtc | |
| parent | 3319cfeeb8c4047026f84df045c438f7bbd338a6 (diff) | |
| download | linux-next-851d961ff248218f681c53cf0f7f08cf8201a117.tar.gz linux-next-851d961ff248218f681c53cf0f7f08cf8201a117.zip | |
rtc: mv: add suspend/resume support for wakeup
Add PM suspend/resume callbacks to enable/disable IRQ wake for the
RTC alarm interrupt. This allows the RTC alarm to wake the system
from STR (e.g. via rtcwake -m mem -s N).
Without this, the RTC IRQ is masked during suspend by the MPIC's
IRQCHIP_MASK_ON_SUSPEND behavior, preventing alarm-based wakeup.
Signed-off-by: Xue Lei <Xue.Lei@windriver.com>
Link: https://patch.msgid.link/20260611023350.1370881-1-Xue.Lei@windriver.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-mv.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c index c27ad626d09f..f88976fd6d5d 100644 --- a/drivers/rtc/rtc-mv.c +++ b/drivers/rtc/rtc-mv.c @@ -301,6 +301,28 @@ static const struct of_device_id rtc_mv_of_match_table[] = { MODULE_DEVICE_TABLE(of, rtc_mv_of_match_table); #endif +#ifdef CONFIG_PM_SLEEP +static int mv_rtc_suspend(struct device *dev) +{ + struct rtc_plat_data *pdata = dev_get_drvdata(dev); + + if (device_may_wakeup(dev) && pdata->irq >= 0) + enable_irq_wake(pdata->irq); + return 0; +} + +static int mv_rtc_resume(struct device *dev) +{ + struct rtc_plat_data *pdata = dev_get_drvdata(dev); + + if (device_may_wakeup(dev) && pdata->irq >= 0) + disable_irq_wake(pdata->irq); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(mv_rtc_pm_ops, mv_rtc_suspend, mv_rtc_resume); + /* * mv_rtc_remove() lives in .exit.text. For drivers registered via * module_platform_driver_probe() this is ok because they cannot get unbound at @@ -312,6 +334,7 @@ static struct platform_driver mv_rtc_driver __refdata = { .driver = { .name = "rtc-mv", .of_match_table = of_match_ptr(rtc_mv_of_match_table), + .pm = &mv_rtc_pm_ops, }, }; |